Lithium battery electric bicycle is characterized by easy to carry and more labor-saving. Weighing only about 16 kilograms, the battery is only the size of a book, only 2.5 kilograms, can be put in the bag to carry, but also can be used to charge the computer. Functionality is quite strong.
But be careful to use the battery safely. Lithium ions in lithium batteries gain electrons and crystallize lithium atoms on the surface of the material, which can be just as dangerous as overcharging. In case the battery shell ruptures, it can explode.